As Danslex said, you always get better fuel economy with premium. I always record my fuel consumption figures every tank for every car I've owned (since 1993) and this has always been confirmed, not just with Lexus.
There is also a subtle, but noticeable (to me) difference between the 98 octane brands. As I said, I prefer Caltex 98, simply because it has the throttle response I enjoy. I can notice the sluggish throttle response with BP almost as soon as I fill up with it (about 50km later). But, on the flipside, you get slightly better fuel economy with BP compared with Caltex.
I'll never use Shell V Power - terrible throttle response, crap performance, but good fuel economy.
There isn't a Mobil servo within cooee of my "normal route", so I never get to try Synergy 8000.
Btw, are you sure Lexus say 91 octane is ok to use ? I'm pretty sure my RX350 owner's manual says "at least 95 octane".
On the internet you will always see 91 for RX, but that's US 91. For Australians, we need at least 95RON.
Premium?
in Lexus RX330 / RX350 / Toyota Harrier Club
Posted
On the internet you will always see 91 for RX, but that's US 91. For Australians, we need at least 95RON.